A kind of anti-creeping battery cell isolation frame

Abstract

The invention relates to the technical field of isolation frames, and in particular to an anti-creeping battery cell isolation frame; comprising a battery cell shell; a circular frame is fixedly installed on one side of the battery cell shell, and the circular frame comprises a frame body and an elastic rod; the invention provides the elastic rod so that when the battery cell swells during charging, the wavy elastic rod will be compressed by the frame body to adapt to the expansion of the battery cell, and prevent an excessive gap between the battery cell and the frame body, thereby reducing the displacement or string movement of the battery cell, ensuring that the circular frame fixes the battery position, preventing the battery cell from having a gap with a cold plate, and reducing the impact on the thermal performance of the battery system; when the battery cell is discharged and rebounds, the compressed wavy elastic rod is elastically released and restored, thereby effectively preventing the circular frame from being easily displaced, and preventing adjacent battery cells in a battery cell module from being squeezed or bruised due to shape changes during the charging and discharging process; thereby enhancing the mechanical strength and stability of the entire battery module.

Description

Technical Field

[0001] The invention relates to the technical field of isolation frames, in particular to an anti-creeping battery cell isolation frame. Background Art

[0002] A lithium-ion battery module is a power unit that combines multiple lithium-ion battery cells in series and parallel through conductive connectors. An elastic isolation frame is usually installed between adjacent cells in a battery module, so that the isolation frame can effectively absorb and alleviate the vibration and impact generated by the battery during use, protecting the cell from mechanical damage. In addition, when isolating two adjacent batteries, the isolation frame can reduce heat conduction between adjacent cells, thereby reducing performance problems or safety hazards caused by excessive temperature.

[0003] During the use of lithium-ion batteries, the isolation frame is displaced after being reciprocatedly squeezed due to alternating heat and cold, and the normal breathing deformation of the battery cell as the charge state changes. In particular, the cold plate and the box are squeezed downward, causing a gap between the battery cell and the cold plate, which in turn affects the thermal performance of the battery system. Long-term use will cause the electrolyte to decompose and produce gas. These gases will accumulate inside the battery, causing the battery cell shell to swell, which will cause the gap between the battery cells to become smaller or produce uneven pressure, which will cause the isolation frame to be squeezed and displaced, changing its original position, and affecting the fixation of the battery position by the isolation frame.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes an anti-creeping battery cell isolation frame to solve the above technical problems. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention proposes an anti-creeping battery cell isolation frame. The present invention arranges elastic rods so that when the battery cell swells during charging, the wavy elastic rods will be compressed by the frame to adapt to the expansion of the battery cell and prevent excessive gaps from being generated between the battery cell and the frame, thereby reducing the displacement or string movement of the battery cell, ensuring that the loop-shaped frame fixes the battery position, preventing gaps from being generated between the battery cell and the cold plate, and reducing the impact on the thermal performance of the battery system; when the battery cell discharges and rebounds, the compressed wavy elastic rods are elastically released and restored, thereby effectively preventing the loop-shaped frame from being easily displaced, and preventing adjacent battery cells in the battery cell module from being squeezed or bruised due to shape changes during the charging and discharging process; thereby enhancing the mechanical strength and stability of the entire battery module.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the anti-creeping battery cell isolation frame described in the present invention includes a battery cell shell; a circular frame is fixedly installed on one side of the battery cell shell, and the circular frame includes a frame body and an elastic rod; the elastic rod is arranged in a wave shape; the elastic rod is fixedly connected to the frame body; a cavity is provided inside the frame body and the elastic rod; a mounting groove is provided on one side of the battery cell shell close to the circular frame; the circular frame is fixedly installed at the bottom of the mounting groove; the frame body and the elastic rod are both made of a mixture of silicone rubber, TPE, TPU, PVC, and rubber materials; and the cavity is filled with thermal conductive silicone.

[0007] Preferably, the cross-sectional shape of the circular frame is set to a symmetrical double wave shape; an air cavity is opened in the thermal conductive silicone; air holes are opened in the frame body and the side walls of the elastic rod; and the air holes penetrate the thermal conductive silicone and communicate with the air cavity.

[0008] Preferably, a V-shaped groove communicating with the air hole is formed on one side of the air cavity close to the air hole.

[0009] Preferably, a carbon fiber tube is slidingly and sealingly connected in the air hole; a circular hole is opened on the surface of the carbon fiber tube; and the carbon fiber tube is fixedly connected to the inner wall of the air cavity by a tower-shaped spring.

[0010] Preferably, a fixing block is arranged between the frame and the bottom of the mounting groove; the fixing block is made of copper material; the fixing block is fixedly connected to the frame; a slot is provided on a side of the fixing block close to the bottom of the mounting groove; a card is fixedly installed in the slot; a through slot opposite to the slot is provided on the surface of the card; two opposite L-shaped pieces are fixedly connected to the groove wall of the through groove; the L-shaped piece is made of spring steel material; an insertion rod is fixedly connected to the bottom of the mounting groove; an annular groove is provided on the surface of the insertion rod.

[0011] Preferably, a connecting groove is provided on the inner wall of the slot; a push block is slidingly and sealingly connected in the connecting groove; the push block is connected to the inner wall of the cavity by a steel wire rope; and the steel wire rope is used to pull the push block out of the connecting groove.

[0012] Preferably, a groove is provided at one end of the fixing block away from the bottom of the mounting groove; a push plate is connected to the groove in a sliding seal; the groove and the connecting groove are connected through an oil channel; the push plate and the groove wall of the groove are connected through a supporting spring; a through hole is provided on the outer wall of the frame; a pull block is connected to the through hole in a sliding seal; one end of the steel wire rope is fixedly connected to the push plate, and the other end is fixedly connected to the pull block.

[0013] Preferably, a bellows is provided in the cavity; the bellows is sleeved on the surface of the wire rope; one end of the bellows is connected to the inner wall of the cavity, and the other end is connected to the fixing block.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention arranges the elastic rod so that when the battery cell swells during charging, the wavy elastic rod will be compressed by the frame to adapt to the expansion of the battery cell and prevent excessive gaps from being generated between the battery cell and the frame, thereby reducing the displacement or string movement of the battery cell, ensuring that the loop frame fixes the battery position, preventing gaps from being generated between the battery cell and the cold plate, and reducing the impact on the thermal performance of the battery system; when the battery cell rebounds during discharge, the compressed wavy elastic rod is elastically released and restored, thereby effectively preventing the loop frame from being easily displaced and preventing adjacent battery cells in the battery module from being squeezed or bruised due to shape changes during the charging and discharging process; thereby enhancing the mechanical strength and stability of the entire battery module.

[0016] 2. The present invention sets a fixing block. Because the frame is fixedly connected to the fixing block, the fixing block is inserted into the mounting groove, so that the insertion rod fixes the fixing block in the mounting groove, thereby eliminating the need to use adhesive to bond the circular frame to the mounting groove, thereby avoiding the weakening of the bonding interface due to heat accumulation, thereby preventing the problem of loose bonding between the circular frame and the battery cell shell, preventing the circular frame from being displaced by the squeezing of the battery cell shell, ensuring the fixation of the position of the battery cell shell by the circular frame, and without the thermal isolation of the adhesive, so that the heat emitted by the battery cell can be quickly and effectively transferred by the circular frame, avoiding heat accumulation in the battery cell, thereby improving the heat dissipation performance of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0018] Figure 1 is a three-dimensional diagram of the arrangement of the battery modules used in the present invention;

[0019] Figure 2 is a three-dimensional diagram of a single battery in the present invention;

[0020] Figure 3 is a schematic diagram of the structure of a single battery used in the present invention;

[0021] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0022] Figure 5 yes Figure 3 The enlarged view of point B in the middle;

[0023] Figure 6 It is a schematic diagram of the structure of the circular frame used in the present invention;

[0024] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0025] In the figure: 1. battery cell shell; 11. mounting groove; 12. fixing block; 121. slot; 13. card; 131. through groove; 132. L-shaped piece; 14. plug rod; 141. annular groove; 15. connecting groove; 151. push block; 16. wire rope; 17. groove; 171. push plate; 172. oil channel; 173. support spring; 18. through hole; 181. pull block; 19. bellows; 2. circular frame; 21. frame; 22. elastic rod; 23. cavity; 24. thermal conductive silicone; 241. air cavity; 25. air hole; 251. V-shaped groove; 26. carbon fiber tube; 261. round hole; 262. tower spring. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] like Figures 1 to 7 As shown, an anti-creeping battery cell isolation frame described in the present invention includes a battery cell shell 1; a circular frame 2 is fixedly installed on one side of the battery cell shell 1, and the circular frame 2 includes a frame body 21 and an elastic rod 22; the elastic rod 22 is arranged in a wave shape; the elastic rod 22 is fixedly connected to the frame body 21; a cavity 23 is provided inside the frame body 21 and the elastic rod 22; a mounting groove 11 is provided on one side of the battery cell shell 1 close to the circular frame 2; the circular frame 2 is fixedly installed at the bottom of the mounting groove 11; the frame body 21 and the elastic rod 22 are both made of a mixture of silicone rubber, TPE, TPU, PVC, and rubber materials; the cavity 23 is filled with thermal conductive silicone 24.

[0028] As an embodiment of the present invention, the cross-sectional shape of the circular frame 2 is set to a symmetrical double wave shape; an air cavity 241 is opened in the thermal conductive silicone 24; air holes 25 are opened on the side walls of the frame body 21 and the elastic rod 22; the air holes 25 penetrate the thermal conductive silicone 24 and are connected with the air cavity 241.

[0029] As an embodiment of the present invention, a V-shaped groove 251 communicating with the air hole 25 is formed on a side of the air cavity 241 close to the air hole 25 .

[0030] As an embodiment of the present invention, a carbon fiber tube 26 is slidably and sealedly connected in the air hole 25; a circular hole 261 is opened on the surface of the carbon fiber tube 26; the carbon fiber tube 26 is fixedly connected to the inner wall of the air cavity 241 by a conical spring 262;

[0031] When the lithium-ion battery is in use, the circular frame 2 is displaced after being reciprocatedly squeezed due to alternating heat and cold, and the normal breathing deformation of the battery cell as the charge state changes. In particular, the cold plate and the box are squeezed downward, causing a gap between the battery cell and the cold plate, thereby affecting the thermal performance of the battery system. Long-term use will cause the electrolyte to decompose and generate gas. These gases will accumulate inside the battery, causing the battery cell shell 1 to swell. As a result, the gap between the battery cells becomes smaller or uneven pressure is generated, which will cause the circular frame 2 to be squeezed and displaced, changing its original position, thereby affecting the fixation of the battery position by the circular frame 2.

[0032] In this regard, the present invention sets the elastic rod 22 so that when the battery cell swells during charging, the wavy elastic rod 22 will be compressed by the frame 21 to adapt to the expansion of the battery cell and prevent excessive gaps from being generated between the battery cell and the frame 21, thereby reducing the displacement or string movement of the battery cell, ensuring that the circular frame 2 fixes the battery position, preventing gaps from being generated between the battery cell and the cold plate, and reducing the impact on the thermal performance of the battery system; when the battery cell is discharged and rebounds, the compressed wavy elastic rod 22 is elastically released and restored, thereby effectively preventing the circular frame 2 from being easily displaced, and preventing adjacent battery cells in the battery module from being squeezed or bruised due to shape changes during the charging and discharging process; thereby enhancing the mechanical strength and stability of the entire battery module;

[0033] The thermal conductive silicone 24 is a material mixed with silicone oil and specific chemical raw materials, which has good thermal conductivity, voltage resistance, insulation and flexibility, and can effectively adhere to the surface of the power device, so as to achieve the best thermal conductivity and heat dissipation effect; by setting the frame 21 and the elastic rod 22 to be a mixture of silicone rubber, TPE, TPU, PVC, and rubber materials, TPE and TPU enhance the wear resistance and weather resistance (heat resistance) of the frame 21 and the elastic rod 22, PVC increases the corrosion resistance, so that the service life of the frame 21 and the elastic rod 22 is improved, and the rubber provides additional flexibility, so that the frame 21 and the elastic rod 22 are easy to be produced by injection molding or extrusion molding, thereby reducing the difficulty of producing the frame 21 and the elastic rod 22; the initial state In the state, the elastic rod 22 is fixedly connected to the frame 21, and the elastic rod 22 and the cavity 23 of the frame 21 are both in a connected state; first, the battery cell is loaded into the battery cell shell 1, and then the circular frame 2 is bonded to the mounting groove 11 of the battery cell shell 1 by using an adhesive, and finally the battery cell shell 1 with the battery cell and the frame 21 is put into the battery module box, so that the adjacent battery cell shells 1 are in contact through the circular frame 2; during the charging process of the lithium-ion battery, the battery cell of the lithium-ion battery module will undergo normal shell breathing deformation, that is, the battery cell expands due to charging, so that the battery cell shell is pushed by the battery cell and swells, and the highest point of the swell is at the center of the large volume structure, and it gently descends to the surroundings. During the swell process, the expansion force will be applied to the circular frame 2;

[0034] Since the bottom and side walls of the existing battery module box are both equipped with cold plates for cooling the battery cells, heat will be generated when the battery is charged, and the cavity 23 of the frame 21 and the elastic rod 22 is filled with thermally conductive silicone 24, so that the thermally conductive silicone 24 can quickly dissipate the heat conducted by the battery cell shell 1, thereby improving the heat dissipation effect of the frame 21 and the elastic rod 22; the force when the battery swells is outward, and it will apply uniform pressure along the contact surface between the circular frame 2 and the battery cell shell 1, so that the circular frame 2 applies pressure to the elastic rod 22, so that the crest part of the wavy elastic rod 22 bends inward, while the elastic material of the trough part is compressed, thereby adapting to the expansion of the battery cell shell 1, balancing the expansion force of the battery cell shell 1, and The expansion part of the battery cell shell 1 is provided with stable support; the swollen part of the battery is prevented from unnecessary movement or displacement in the frame 21, and an excessive gap between the battery and the frame 21 is avoided; the displacement or stringing of the battery cell shell 1 caused by the interaction force is reduced, and a gap is prevented between the moving battery cell shell 1 and the cold plate, thereby improving the thermal performance of the battery system; when the battery cell is discharged, the elastic material of the elastic rod 22 will gradually return to its original shape without force, thereby balancing the change in the volume of the battery cell and maintaining the stability of the structure; because the frame 21 and the wavy elastic rod 22 are located between two adjacent battery cell shells 1, when the battery cell shell 1 swells, the frame 21 and the wavy elastic rod 22 will be affected by the two The expansion part of the battery cell shell 1 is squeezed, so that the cavity 23 of the frame body 21 and the elastic rod 22 is compressed, and the thermal conductive silicone 24 fixed to the inner wall of the cavity 23 is compressed; and the air cavity 241 is opened inside the thermal conductive silicone 24 to improve the compression effect of the thermal conductive silicone 24, increase the buffer space provided when the battery cell swells, and then the space of the circular frame 2 absorbs the expansion of the battery cell, and at the same time directly reduces the elastic pressure exerted by the circular frame 2 on the battery cell shell 1, reduces the mechanical stress caused by swelling; improves the supporting effect of the circular frame 2 on the battery cell shell 1; when the circular frame 2 is squeezed at the expansion part of the battery cell shell 1, the gas in the air cavity 241 of the thermal conductive silicone 24 is squeezed and ejected through the air hole 25, due to the gas The existence of the cavity 241 will increase the heat conduction path and reduce the overall thermal conductivity of the thermally conductive silicone 24, that is, reduce the heat dissipation performance of the thermally conductive silicone 24; therefore, when the air cavity 241 is squeezed, the space of the air cavity 241 will be reduced, thereby causing the heat conduction path to be reduced, thereby improving the heat transfer efficiency and accelerating the heat dissipation effect of the charged battery module; and the setting of the V-shaped groove 251 is that when the thermally conductive silicone 24 is squeezed, the opening of the end of the V-shaped groove 251 away from the air hole 25 opens, so that the end of the V-shaped groove 251 with a larger opening can reduce the resistance of the air flow, so that the air flow in the air cavity 241 enters the air hole 25 more smoothly; thereby increasing the air flow speed inside the air hole 25, which helps to enhance the heat dissipation effect;Since the cross-sectional shapes of the circular frame 2 and the internal cavity 23 are set to be symmetrical double wavy shapes, the heat-conducting silicone rubber 24 fixedly connected to the inner wall of the cavity 23 is also double wavy. Therefore, when the heat-conducting silicone rubber 24 is compressed, the carbon fiber tube 26 located in the air hole 25 of the side wall is close to the inner wall of the air cavity 241, so that the space between the carbon fiber tube 26 and the inner wall of the air cavity 241 is reduced, so that the tower-shaped spring 262 is compressed, so that the compressed tower-shaped spring 262 pushes the carbon fiber tube 26 out of the air hole 25 under the action of the elastic restoring force, so as to avoid the side walls from being close to each other and blocking the air hole 25 when the frame body 21 and the elastic rod 22 are squeezed, thereby affecting the hot air ejection in the air cavity 241. Therefore, by setting the carbon fiber tube 26, the carbon fiber The carbon fiber tube 26 can extend out of the air hole 25 and is not blocked by the side walls of the frame 21 and the elastic rod 22, so that the hot air in the air cavity 241 can enter through the circular hole 261 of the carbon fiber tube 26 and be ejected from one end of the carbon fiber tube 26 extending out of the air hole 25, so that the heat in the air cavity 241 can be quickly dissipated, so as to improve the heat dissipation effect of the frame 21 and the elastic rod 22 on the battery cell housing 1, and the V-shaped groove 251 is set, so that when the carbon fiber tube 26 enters the air hole 25, the circular hole 261 on the surface of the carbon fiber tube 26 is located in the V-shaped groove 251, so as to avoid the circular hole 261 from being blocked by the inner wall of the air hole 25 due to entering the air hole 25, thereby ensuring that the hot air in the air cavity 241 can be effectively discharged from the carbon fiber tube 26, so that the practicality of the present invention is improved;

[0035] To determine the size parameters of the circular frame 2, it is necessary to first build a model to confirm the thickness of the core inside the battery cell, determine D1, that is, the thickness of the positive electrode + negative electrode + separator, and then use the positive and negative electrodes that have been rolled and left to stand in a vacuum environment at 60°C for 4 hours as the measurement base to determine the number of N1 core layers. The thickness of 1 positive electrode + 1 negative electrode + 1 separator is 1 layer, and 1.023 is used as the empirical coefficient. Due to the different compaction densities of the positive and negative electrodes, there are great differences and cannot be applied. The thickness of the entire core is D1*N1*1.023. Considering that there is a gap in the shell of the core and the thickness of the shell wall, it should be added to the thickness of the entire battery cell to form a whole; 9.78% is used as a dual-cell battery. Cycle expansion coefficient, i.e., the empirical data of the overall expansion of the battery cell when fully charged and before the end of the cycle life, mainly comes from the swelling of the single battery cell shell 1 at the end of the cycle test. It should also be noted that the general cycle life test ends at 500 or 1000 times. If it is 500 times, it is necessary to consider that the end of life will expand more, and increase it by 1.2-1.5 times. If it is 1000 times, it does not need to be increased, because the 1000 times will be fixed under the cycle pressure of 0.2MPa and will no longer expand; T = ""D1 (1 layer core thickness) * N1 number of layers" * 1.023 + (shell reserved gap + shell wall thickness) * 2" * 9.78% -1.37;

[0036] The size of the frame 21 of the circular frame 2 is determined by the fact that when the battery cell is fully charged or in the cycle process, the highest point of swelling is at the center of the large volume structure, and it decreases gently to the surrounding areas. Through mathematical modeling, the two adjacent battery cells in the maximum expansion state are considered as a triangle, and the two sides of the triangle are the shell surfaces of the two battery cells simplified into lines, and the intersecting vertex is the middle position of the battery cell volume structure (the highest point of swelling); the bottom edge is the area of ​​the distance between the bottom edges of the two battery cells measured under a pressure of 0.2MPa (1S), where line a is the upper limit position of the frame pasting, and line b is the lower limit position of the frame pasting, that is, the width of the frame must be (ba); taking the data of 98Ah battery cells as an example, the upper and lower widths of the circular frame in the 1S area are measured, line a is 47mm, and line b is 57mm, that is, the maximum bottom width is 10mm, and the upper part is treated similarly; according to the size of the frame 21 of the circular frame 2, that is, the size parameters, the mounting groove 11 of the battery cell shell 1 can be processed and produced in the same way.

[0037] As an embodiment of the present invention, a fixing block 12 is arranged between the frame 21 and the bottom of the mounting groove 11; the fixing block 12 is made of copper material; the fixing block 12 is fixedly connected to the frame 21; a slot 121 is provided on a side of the fixing block 12 close to the bottom of the mounting groove 11; a card 13 is fixedly installed in the slot 121; a through slot 131 opposite to the slot 121 is provided on the surface of the card 13; two opposite L-shaped pieces 132 are fixedly connected to the groove wall of the through slot 131; the L-shaped piece 132 is made of spring steel material; an insertion rod 14 is fixedly connected to the bottom of the mounting groove 11; an annular groove 141 is provided on the surface of the insertion rod 14.

[0038] As an embodiment of the present invention, a connecting groove 15 is opened on the inner wall of the slot 121; a push block 151 is slidingly and sealingly connected in the connecting groove 15; the push block 151 is connected to the inner wall of the cavity 23 by a steel wire rope 16; the steel wire rope 16 is used to pull the push block 151 out of the connecting groove 15.

[0039] As an embodiment of the present invention, a groove 17 is provided at one end of the fixing block 12 away from the bottom of the mounting groove 11; a push plate 171 is connected in a sliding seal in the groove 17; the groove 17 is connected to the connecting groove 15 through an oil passage 172; the push plate 171 is connected to the groove wall of the groove 17 through a support spring 173; a through hole 18 is provided on the outer wall of the frame 21; a pull block 181 is connected in a sliding seal in the through hole 18; one end of the steel wire rope 16 is fixedly connected to the push plate 171, and the other end is fixedly connected to the pull block 181.

[0040] As an embodiment of the present invention, a bellows 19 is provided in the cavity 23; the bellows 19 is sleeved on the surface of the wire rope 16; one end of the bellows 19 is connected to the inner wall of the cavity 23, and the other end is connected to the fixing block 12;

[0041] During operation, the circular frame 2 and the battery cell shell 1 are mostly bonded by adhesive, but the battery cell generates heat during the charging and discharging process, and the generated heat is transferred to the bonding area, causing the bonding performance of the adhesive to change; especially when the thermal conductivity of the adhesive is low, the heat accumulation may aggravate the weakening of the bonding interface, resulting in a loose bond between the circular frame 2 and the battery cell shell 1, which makes the circular frame 2 easily displaced by the extrusion of the battery cell shell 1, changing its original positioning, and further affecting the fixation of the battery position by the circular frame 2; and the adhesive has a certain thermal isolation, which will hinder the heat generated by the battery cell from being effectively transferred to the circular frame 2 or other heat dissipation structures, causing heat to accumulate at the battery cell, affecting the heat dissipation performance;

[0042] In this regard, the present invention sets a fixing block 12. Since the frame 21 is fixedly connected to the fixing block 12, the fixing block 12 is inserted into the mounting groove 11, so that the insertion rod 14 fixes the fixing block 12 in the mounting groove 11, thereby eliminating the need to use adhesive to bond the circular frame 2 to the mounting groove 11, thereby avoiding the weakening of the bonding interface due to heat accumulation, thereby preventing the problem of loose bonding between the circular frame 2 and the battery cell shell 1, and preventing the circular frame 2 from being displaced by the squeezing of the battery cell shell 1, thereby ensuring that the circular frame 2 fixes the position of the battery cell shell 1, and without the thermal isolation of the adhesive, the heat emitted by the battery cell can be quickly and effectively transferred by the circular frame 2, thereby avoiding heat accumulation at the battery cell, thereby improving the heat dissipation performance of the present invention;

[0043] The user inserts the fixing block 12 into the mounting groove 11 so that the slot 121 of the fixing block 12 is aligned with the insertion rod 14, so that the insertion rod 14 in the mounting groove 11 is inserted into the slot 121. In the process of inserting the insertion rod 14 into the slot 121, the insertion rod 14 will contact the card 13 and enter the through groove 131. Because the end of the insertion rod 14 away from the bottom of the mounting groove 11 is set in a curved surface, the insertion rod 14 entering the through groove 131 will push the two L-shaped pieces 132 to open in a direction away from each other. At this time, the insertion rod 14 passes between the two L-shaped pieces 132. At this time, the insertion rod 14 slides and contacts with the side of the two L-shaped pieces 132 that is close to each other until the fixing block 12 is completely entered into the fixing groove. At this time, the insertion rod 14 drives the annular groove 141 on the surface to the L-shaped piece 132. Because the L-shaped piece 132 is made of spring steel material, the L-shaped piece 132 is reset and snapped into the ring under the action of its own elastic restoring force. shaped groove 141, and the L-shaped piece 132 is pressed against the bottom of the annular groove 141 at this time. When the circular frame 2 is easily displaced by the extrusion of the battery shell 1, the circular frame 2 will drive the card 13 and the L-shaped piece 132 to displace through the fixing block 12, but the L-shaped piece 132 is in sliding and sealing contact with the insertion rod 14, so that the insertion rod 14 blocks the L-shaped piece 132, thereby blocking the movement of the circular frame 2, so that the insertion rod 14 fixes the fixing block 12 in the installation groove 11 under the engagement of the L-shaped piece 132; thereby improving the fixing effect of the circular frame 2 on the battery position; the battery of the lithium-ion battery module often swells after long-term use, which is due to the accumulation of gas inside the battery or the chemical reaction inside the battery, causing the battery to swell; and if the swollen battery further expands, it will cause safety hazards such as leakage, explosion or fire, so the swollen battery needs to be replaced in time;The replaced swollen battery often needs to be separated from the circular frame 2 for proper recycling and disposal. In order to facilitate the removal of the circular frame 2, the present invention provides a steel wire rope 16 and a push block 151. When the circular frame 2 needs to be removed, the user only needs to pull the pull block 181, so that the pull block 181 pulls the steel wire rope 16 fixed thereto to pull the push plate 171 out of the groove 17, so that the push plate 171 squeezes the hydraulic oil in the groove 17 into the connecting groove 15 through the oil passage 172. When the push block 151 in the connecting groove 15 is extended out of the connecting groove 15, the hydraulic oil can push the push block 151 in the connecting groove 15 to extend out of the connecting groove 15, so that the push block 151 contacts the L-shaped piece 132. As the push block 151 continues to extend out of the connecting groove 15, the push block 151 pushes the L-shaped piece 132 to elastically deform and rotate upward in a direction away from each other, so that the sides of the two L-shaped pieces 132 that are close to each other continue to move away from the annular groove 141 of the insertion rod 14, until the push plate 171 extends out of the groove 17 to the maximum length. At this time, the L-shaped piece 132 extends out of the annular groove 141. , and the L-shaped piece 132 is no longer in contact with the push block 151, and the wire rope 16 of the pull block 181 is continuously pulled, so that the pull block 181 pulls the push plate 171 through the wire rope 16 to drive the fixed block 12 away from the installation slot 11. Because the L-shaped piece 132 is not in contact with the insertion rod 14, the insertion rod 14 is not blocked by the L-shaped piece 132, and the insertion rod 14 is quickly extended from the slot 121, so that the fixed block 12 is no longer fixed in the installation slot 11, which reduces the difficulty of disassembling the circular frame 2 and reduces the labor intensity of the staff; The practicality of the present invention is further improved; the bellows 19 is used to store the steel wire rope 16, so that when the circular frame 2 is squeezed, the bellows 19 is compressed, and the steel wire rope 16 is still located in the bellows 19, so as to prevent the loose steel wire rope 16 from being released in the air cavity 241, thereby preventing the loose steel wire rope 16 from causing entanglement and contact interference with the carbon fiber tube 26 and the conical spring, thereby ensuring that the present invention can operate normally and stably, so that the practical application effect of the present invention is further improved. ;

[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An anti-creeping battery cell isolation frame, comprising a battery cell housing (1); a circular frame (2) is fixedly mounted on one side of the battery cell housing (1), characterized in that: The circular frame (2) comprises a frame body (21) and an elastic rod (22); the elastic rod (22) is arranged in a wave shape; the elastic rod (22) is fixedly connected to the frame body (21); a cavity (23) is provided inside the frame body (21) and the elastic rod (22); a mounting groove (11) is provided on a side of the battery cell housing (1) close to the circular frame (2); the circular frame (2) is fixedly installed at the bottom of the mounting groove (11); the frame body (21) and the elastic rod (22) are both made of a mixture of silicone rubber, TPE, TPU, PVC and rubber materials; and the cavity (23) is filled with thermal conductive silicone rubber (24).

2. The anti-creeping battery cell isolation frame according to claim 1, characterized in that: The cross-sectional shape of the circular frame (2) is set to a symmetrical double wave shape; an air cavity (241) is opened in the thermal conductive silica gel (24); air holes (25) are opened on the side walls of the frame body (21) and the elastic rod (22); and the air holes (25) penetrate the thermal conductive silica gel (24) and are connected with the air cavity (241).

3. The anti-creeping battery cell isolation frame according to claim 2, characterized in that: A V-shaped groove (251) communicating with the air hole (25) is provided on one side of the air cavity (241) close to the air hole (25).

4. The anti-creeping battery cell isolation frame according to claim 3, characterized in that: A carbon fiber tube (26) is slidably and sealingly connected inside the air hole (25); a circular hole (261) is opened on the surface of the carbon fiber tube (26); and the carbon fiber tube (26) is fixedly connected to the inner wall of the air cavity (241) via a tower spring (262).

5. The anti-creeping battery cell isolation frame according to claim 1, characterized in that: A fixing block (12) is arranged between the frame (21) and the bottom of the installation groove (11); the fixing block (12) is made of copper material; the fixing block (12) is fixedly connected to the frame (21); a slot (121) is provided on a side of the fixing block (12) close to the bottom of the installation groove (11); a card (13) is fixedly installed in the slot (121); a through slot (131) facing the slot (121) is provided on the surface of the card (13); two facing L-shaped pieces (132) are fixedly connected to the slot wall of the through slot (131); the L-shaped piece (132) is made of spring steel material; an insertion rod (14) is fixedly connected to the bottom of the installation groove (11); an annular groove (141) is provided on the surface of the insertion rod (14).

6. The anti-creeping battery cell isolation frame according to claim 5, characterized in that: The inner wall of the slot (121) is provided with a connecting groove (15); a push block (151) is slidably and sealably connected inside the connecting groove (15); the push block (151) is connected to the inner wall of the cavity (23) via a steel wire rope (16); the steel wire rope (16) is used to pull the push block (151) out of the connecting groove (15).

7. The anti-creeping battery cell isolation frame according to claim 6, characterized in that: A groove (17) is provided at one end of the bottom of the fixing block (12) away from the mounting groove (11); a push plate (171) is slidably and sealably connected in the groove (17); the groove (17) is communicated with the connecting groove (15) via an oil passage (172); the push plate (171) is connected to the groove wall of the groove (17) via a supporting spring (173); a through hole (18) is provided on the outer wall of the frame (21); a pull block (181) is slidably and sealably connected in the through hole (18); one end of the steel wire rope (16) is fixedly connected to the push plate (171), and the other end is fixedly connected to the pull block (181).

8. The anti-creeping battery cell isolation frame according to claim 7, characterized in that: A bellows (19) is arranged in the cavity (23); the bellows (19) is sleeved on the surface of the steel wire rope (16); one end of the bellows (19) is connected to the inner wall of the cavity (23), and the other end is connected to the fixing block (12).

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